EP2622888B1 - Préservation de la confidentialité pour les dispositifs sans fil - Google Patents

Préservation de la confidentialité pour les dispositifs sans fil Download PDF

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Publication number
EP2622888B1
EP2622888B1 EP20110830038 EP11830038A EP2622888B1 EP 2622888 B1 EP2622888 B1 EP 2622888B1 EP 20110830038 EP20110830038 EP 20110830038 EP 11830038 A EP11830038 A EP 11830038A EP 2622888 B1 EP2622888 B1 EP 2622888B1
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EP
European Patent Office
Prior art keywords
bssid
data packet
wireless
controller
wireless data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20110830038
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German (de)
English (en)
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EP2622888A2 (fr
EP2622888A4 (fr
Inventor
Nimrod Diamant
David Gordon
Benjamin Getz
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Intel Corp
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Intel Corp
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Publication of EP2622888A2 publication Critical patent/EP2622888A2/fr
Publication of EP2622888A4 publication Critical patent/EP2622888A4/fr
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Publication of EP2622888B1 publication Critical patent/EP2622888B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/69—Identity-dependent
    • H04W12/73—Access point logical identity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information

Definitions

  • This disclosure relates generally to the field of wireless communication, and in particular to privacy control for wireless devices.
  • Sensors such as location detecting sensors including GPS
  • GPS location detecting sensors
  • LANs local area networks
  • WLAN wireless local area networks
  • WiFi receive their IP address from the infrastructure around it.
  • a WiFi (WLAN) device acquires the identification number (basic service set identifier or BSSID) of access points it sees around it (or associates with) as part of its normal mode of operation.
  • the WiFi access point's BSSID is a unique identifier that can be used to find out the access point's location and thereof also the device's location, especially in mobile platforms.
  • Every WiFi adapter provides, upon a host software request, the BSSID of the associated access point and of other access points around it, as well as other data like signal strength, etc. Based on such data and sometimes using sophisticated triangulation calculation, these Internet servers will provide the client machine (or others) with a high accuracy estimation of the machine's location.
  • WiFi access point information is easily obtained by every software on the platform, and thus the user's privacy can be violated if software collects and sends such platform sensors' information to unauthorized or uncontrolled destinations. Also, in case such information is openly communicated over the network, it can be seen by others and used to determine and track the user's location.
  • software can access the WLAN driver using standard APIs and get information about the access points that the WLAN card sees.
  • SSIDS are translated by a network detector in descriptive and understandable text, symbols or names that can be displayed to the user.
  • Access Point Any entity that has a station (STA) functionality and provides access to the distribution services, via the wireless medium (WM) for associated STAs.
  • STA station
  • WM wireless medium
  • Basic service set The basic building block of an IEEE 802.11 wireless LAN (according to the IEEE 802.11-1999 standard).
  • a single access point (AP) together with all associated stations (STAs) is called a BSS.
  • STAs stations
  • Independent mode a set of synchronized STAs, one of which acts as master, forms a BSS.
  • Each BSS is identified by a BSSID.
  • the most basic BSS consists of one AP and one STA.
  • BSSID Basic Service Set Identifier
  • a Media Access Control is a data communication protocol sub-layer, also known as the Medium Access Control, is a sublayer of the Data Link Layer specified in the seven-layer OSI model (layer 2).
  • MS Mobile Station
  • STA Any device that contains an IEEE 802.11-conformant medium access control (MAC) and physical layer (PHY) interface to the wireless medium (WM).
  • MAC medium access control
  • PHY physical layer
  • STA Any device that contains an IEEE 802.11-conformant medium access control (MAC) and physical layer (PHY) interface to the wireless medium (WM).
  • MAC medium access control
  • PHY physical layer
  • Packet A basic unit for data transmission between stations.
  • Wireless medium The medium used to implement the transfer of protocol data units (PDUs) between peer physical layer (PHY) entities of a wireless local area network (LAN).
  • PDUs protocol data units
  • PHY peer physical layer
  • LAN wireless local area network
  • a computer-implemented method includes receiving, at a wireless adaptor of a device, a wireless data packet from an access point (AP), wherein the wireless data packet includes a Basic Service Set Identifier (BSSID) of the AP; changing the BSSID of the received data packet by a processor to produce a modified wireless data packet; and transmitting the modified wireless data packet to an application on the device.
  • AP access point
  • BSSID Basic Service Set Identifier
  • changing the BSSID can include encrypting the BSSID, scrambling the BSSID, or both.
  • the method can further include receiving a seed value or an encryption key from a controller to change the BSSID, wherein the controller is electrically coupled to the wireless adaptor.
  • the encryption key can include a public encryption key or a private encryption key and the controller can include a manageability engine.
  • the change of the BSSID can hide an actual BSSID from a software program, an operating system, or both of the device.
  • the change of the BSSID can allow a location derived from an actual BSSID to be hidden from a software program, an operating system, or both of the device.
  • the method can include transferring the received BSSID to an authenticated entity in a secured manner, wherein the received BSSID can be used to determine a location of the AP and provide a service related to location but preventing the application or an operating system of the device from assessing the received BSSID data and location data.
  • a computer-implemented method includes receiving, at a wireless adaptor of a device, a wireless data packet including a modified a Basic Service Set Identifier (BSSID) of an access point (AP); changing the modified BSSID of the received wireless data packet by a processor to produce a unmodified wireless data packet; and transmitting the wireless data packet to the AP.
  • BSSID Basic Service Set Identifier
  • the method can include changing the BSSID includes decrypting the BSSID, descrambling the BSSID, or both.
  • the method can include receiving a decryption key from a controller to change the BSSID, wherein the controller is electrically coupled to the wireless adaptor.
  • the decryption key can include a public decryption key or a private decryption key and the controller can include a manageability engine.
  • the method can further include receiving a seed value or a decryption key from a controller to initiate the unscrambling of the BSSID.
  • a device in accordance with some aspects of the present disclosure, includes a wireless adaptor including a processor in communication with a memory having instructions stored therein which, when executed: receive a wireless data packet from an access point (AP), wherein the wireless data packet includes a Basic Service Set Identifier (BSSID) of the AP; change the BSSID of the received data packet to produce a modified wireless data packet; and transmit the modified wireless data packet to an application on the device.
  • AP access point
  • BSSID Basic Service Set Identifier
  • the wireless adaptor can be configured to change the BSSID by encrypting the BSSID, scrambling the BSSID, or both.
  • the device can include a controller configured to provide an encryption key to the wireless adaptor for used in encrypting the BSSID, wherein the controller can include a manageability engine.
  • the wireless adaptor can be configured to separate information derived from an actual BSSID from a software program, an operating system, or both of the device.
  • SW Unauthorized software
  • APIs application programming interfaces
  • This SW or malware can reveal information to a malicious user that can later be used to track the computer as well as the location of the user. This access to the location without first getting consent from the user or being part of an application white list that are secure enough to be allowed to access this sensitive info can cause harm to the user.
  • a WiFi AP BSSID can be hidden from an operating system (OS) and general SW applications and be only transferred securely to authentic and approved applications and/or servers.
  • location revealing information can be hidden from OS/SW and passed securely to either some secure network server (which can give location based services) or to a secure OS service or application that can then track device location and provide this information only to authenticated apps or usages.
  • sensor data provided by various sensor devices either connected to or coupled with the user's computer can also be hidden or secured.
  • a standardized API and device driver interface (DDI) that works with the various sensors and their sensor data can be hidden or secured from OS/SW on the user's computer.
  • Sensors can come in many configurations including both hardware devices and software.
  • logical sensors can provide information through emulation of sensor functionality in software or firmware.
  • a single hardware device can contain multiple sensors.
  • the various sensors can include location sensors, such as GPS devices.
  • sensors can be software based, such as an IP resolver that provides location information based on an Internet address, a mobile phone tower triangulator, such as in a cellular network, that determines location based on nearby towers, or a Wi-Fi network location provider that reads location information from the connected wireless network hub.
  • IP resolver that provides location information based on an Internet address
  • mobile phone tower triangulator such as in a cellular network, that determines location based on nearby towers
  • Wi-Fi network location provider that reads location information from the connected wireless network hub.
  • actual (unscrambled) access points BSSID data can be altered so that software, whether intentionally or unintentionally loaded onto a user's device, can not determine the BSSID data.
  • a wireless adaptor such as a WLAN hardware or WLAN host driver, can alter, such as by scrambling or encrypting, the BSSIDs that is provided to software operating on the device. Once this scrambling algorithm is enabled, the software will receive a false (scrambled) BSSIDs picture so that in an attempt to send this data to web servers to resolve the device's location, an erroneous location or no location would result. With user control over that capability, location can be exposed to all applications or to no application or to limited/selected applications.
  • control over the wireless adapter can also be done securely by an out-of-band signal from a trusted platform entity or a hardware/software controller, i.e., but not limited to, a Manageability Engine (ME) or a WLAN OS driver.
  • a trusted platform entity i.e., but not limited to, a Manageability Engine (ME) or a WLAN OS driver.
  • ME Manageability Engine
  • user control can be performed at a BIOS level (pre OS) or through secured input/output of the ME, or through a trusted web site that can send user's instructions signed and encrypted to ME.
  • a trusted entity like the ME can access the WLAN BSSID information out-of-band (OOB) through a control bus, such as ME C-link control bus.
  • ME can provide to the WLAN controls for this capability (enable/disable) as well as per platform unique random scrambling/unscrambling key generation and/or storage for the BSSIDs translation from the real actual numbers to the scrambled numbers exposed to the device.
  • the WLAN card can implement a scrambling/unscrambling algorithm or use a real BSSID to scrambled BSSID translation or look-up table that pairs an actual BSSID with an equivalent scrambled BSSID.
  • the device When privacy mode is enabled, the device through, for example, a wireless adapter, can detect actual access points and replace the actual BSSID of the actual access points with a scrambled BSSID based on the scrambling algorithm. The scrambled BSSID, and not the actual BSSID, can then be exposed to the device's software. This process can be performed on a packet by packet basis. Similarly, when the device transmits a wireless data packet, the wireless adaptor can replace the scrambled BSSID that comes from the device driver with the actual, physical BSSID.
  • OOB out-of-band
  • control bus such as ME C-link
  • FIG 1 shows an example system in accordance with various aspects of the present disclosure.
  • Device 105 is shown communicating with device 110 through access point 115 over wireless medium 120.
  • Devices 105 and 110 have their own MAC address.
  • the MAC address of device 105 will be labeled "MAC address (C)
  • the MAC address of device 110 will be labeled "MAC address (A)”
  • access point 115 will have a BSSID ID labeled "BSSID (B).”
  • Devices 105 and 110 can be STAs or MS and can include computers such as a desktop, laptop, or smart phone.
  • Device 105 can include wireless adaptor 130 such as WiFi adapter having a MAC address.
  • Device 105 can also include BSSID scrambling algorithm 135 communicating with OS WLAN stack and applications 140 over bus 150, such as a PCI bus.
  • Transceiver 155 can be electrically coupled to and controlled by wireless adapter 130 and can communication with access point 115 and device 110 over wireless medium 120.
  • Access point 115 can communicate with device 110 through network 125, such as a LAN.
  • Transceiver 160 can be electrically coupled to and controlled by access point 115 and can communication with device 105 and/or device 110 over wireless medium 120 and with device 110 over network 125.
  • BSSID scrambling algorithm 135 can be arranged to mask, translate, scramble or encrypt BSSID of access point 115 using a variety of techniques, such as those techniques that would be appreciate by those of ordinary skill in the art.
  • the word “scramble” or “unscramble” will be general term for the various methods in which the BSSID can be altered as described herein.
  • the BSSID can be replaced with a similar, but unused or unrelated BSSID, such that the BSSID of access point 115 is not identical with the replacement BSSID.
  • the replacement BSSID can effectively mask or hide the actual BSSID from applications running on device 105.
  • the BSSID can also be scrambled using algorithms other than cryptographic algorithms.
  • a symmetric or asymmetric cryptographic algorithm may be used.
  • symmetric cryptographic algorithms that can be used include Advanced Encryption Standard (AES) and Data Encryption Standard (DES).
  • AES Advanced Encryption Standard
  • DES Data Encryption Standard
  • Other types of symmetric algorithms may also be used.
  • the types of asymmetric cryptographic algorithms that may be used include, but not limited to, public key encryption including RSA cryptography.
  • device 105 can also include a controller 170 (shown in dotted line) such as a Manageability Engine (ME) that is configured to communicate with BSSID scrambling algorithm 135 stored within a memory of wireless adaptor 130.
  • Controller 170 can provide a seed or encryption key and/or a look-up table for the WLAN BSSID translator.
  • Controller 170 can also communicate with applications 145 (shown in dotted line) over interface 150 (shown in dotted line), such as a host-to-embedded controller interface (HECI).
  • Applications 145 are configured to access the secured scrambled BSSID from controller 170 to be used by within device 105 or by another device in secured communication with device 105.
  • the scrambled BSSID can be made available by a user's consent.
  • Figure 2 shows an example data flow between device 110 and 105.
  • Device 110 assembles and transmits data packet 205 to access point 115 through network 125.
  • Data packet 205 includes a destination header information 210, for example "C” as shown in the figure, relating to a destination of the wireless packet, a source header information 215, for example "A” as shown in the figure, relating to a source of the wireless packet.
  • Headers 210 and 215 are assembled with the payload data 220, for example "payload” as shown in the figure, into data packet 205.
  • Access point 115 appends its BSSID 225 or "BSSID (B)" to data packet between headers 210 and 215.
  • Data packet 228 is transmitted over wireless medium 120 to device 105.
  • Transceiver 155 receives the transmitted data packet 228 and communicates data packet 228 to wireless adaptor 130.
  • Wireless adaptor 130 disassembles data packet 228 and converts the BSSID of access point 115 to a scrambled BSSID 235 of access point 115 using the scrambling algorithm.
  • Payload data of scrambled data packet can be communicated to OS WLAN stack and applications 140 over bus 150, such that the scrambled BSSID 235 and not the actual BSSID 225 is detectable by OS WLAN stack and applications 140.
  • controller 135 when controller 135 is used, controller 135 can provide, for example, a unique SEED or encryption key and/or a look-up table for WLAN BSSID translator. Applications 145 can then access from controller 135 a secured encrypted BSSID based upon a user's consent over interface 150.
  • OS WLAN stack and applications 140 communicates payload data 250, for example "payload" as shown in the figure, to wireless adaptor 130.
  • Wireless adaptor 130 receives payload data 250 and unscrambles the scrambled BSSID 255 using scrambling algorithm.
  • Unscrambled data packet 260 including unscrambled BSSID 265 is assembled at wireless adaptor 130 and transmitted by transceiver 155.
  • Transceiver 160 of access point 110 receives data packet 260.
  • Access point 110 transmits payload data 260 to device 115 over network 125.
  • various embodiments of this disclosure may be made in hardware, firmware, software, or any suitable combination thereof. Aspects of this disclosure may also be implemented as instructions stored on a machine-readable medium, which may be read and executed by one or more processors.
  • a machine-readable medium may include any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computing device).
  • a machine-readable storage medium may include read only memory, random access memory, magnetic disk storage media, optical storage media, flash memory devices, and others.
  • firmware, software, routines, or instructions may be described herein in terms of specific exemplary embodiments that may perform certain actions. However, it will be apparent that such descriptions are merely for convenience and that such actions in fact result from computing devices, processors, controllers, or other devices executing the firmware, software, routines, or instructions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (15)

  1. Procédé mis en ouvre par ordinateur comprenant les étapes suivantes :
    recevoir, au niveau d'un adaptateur sans fil (130) d'un dispositif (105), un paquet de données sans fil (228) provenant d'un point d' accès (115), AP,
    où le paquet de données sans fil comprend un identifiant d'ensemble de services de base (225), BSSID, de l'AP (115) ;
    changer le BSSID du paquet de données reçu par un processeur de l'adaptateur sans fil (130) pour produire un paquet de données sans fil modifié (235) ; et
    transmettre, par le processeur, le paquet de données sans fil modifié à une application (140) sur le dispositif (105).
  2. Procédé selon la revendication 1, dans lequel changer le BSSID comprend de chiffrer le BSSID, de brouiller le BSSID, ou les deux.
  3. Procédé selon la revendication 1 ou la revendication 2, comprenant en outre de recevoir une valeur initiale ou une clé de chiffrement d'un contrôleur (135) pour changer le BSSID, où le contrôleur (135) est électriquement couplé à l' adaptateur sans fil (130).
  4. Procédé selon la revendication 3, dans lequel la clé de chiffrement comprend une clé de chiffrement publique ou une clé de chiffrement privée.
  5. Procédé selon la revendication 3, dans lequel le contrôleur (135) comprend un moteur de gérabilité.
  6. Procédé selon l'une quelconque des revendications 1 à 4, dans lequel le changement du BSSID cache un BSSID réel d'un programme logiciel, d'un système d'exploitation, ou des deux, du dispositif.
  7. Procédé selon l'une quelconque des revendications 1 à 4, dans lequel le changement du BSSID permet à un emplacement dérivé d'un BSSID réel d'être caché d'un programme logiciel, d'un système d'exploitation, ou des deux, du dispositif.
  8. Procédé selon l'une quelconque des revendications 1 à 4, comprenant en outre de transférer le BSSID reçu à une entité authentifiée de manière sécurisée, où le BSSID reçu peut être utilisé pour déterminer un emplacement de l'AP et pour fournir un service lié à un emplacement mais empêchant l'application ou un système d'exploitation du dispositif d'évaluer les données de BSSID et les données d'emplacement reçues.
  9. Procédé mis en ouvre sur un ordinateur comprenant les étapes suivantes :
    recevoir, au niveau d'un adaptateur sans fil (130) d'un dispositif (105), d'une application sur le dispositif (105), un paquet de données sans fil comprenant un identifiant d'ensemble de services de base (225), BSSID, modifié, d'un point d'accès (115), AP ;
    changer le BSSID modifié du paquet de données sans fil reçu en un BSSID original (265) de l'AP (115) par un processeur de l'adaptateur sans fil (130) pour produire un paquet de données sans fil non-modifié (260) ; et
    transmettre le paquet de données sans fil du processeur à l'AP (115).
  10. Procédé selon la revendication 9, dans lequel changer le BSSID comprend de déchiffrer le BSSID, de désembrouiller le BSSID, ou les deux.
  11. Procédé selon la revendication 9 ou la revendication 10, comprenant en outre de recevoir une clé de déchiffrement d'un contrôleur (135) pour changer le BSSID, où le contrôleur (135) est électriquement couplé à l'adaptateur sans fil (130) .
  12. Procédé selon la revendication 11, dans lequel la clé de déchiffrement comprend une clé de déchiffrement publique ou une clé de déchiffrement privée.
  13. Procédé selon la revendication 10, comprenant en outre de recevoir une valeur initiale ou une clé de déchiffrement d'un contrôleur (135) pour déclencher le désembrouillage du BSSID.
  14. Dispositif (105) comprenant :
    un adaptateur sans fil (130) comprenant un processeur en communication avec une mémoire ayant des instructions y étant stockées qui, lorsqu'elles sont exécutées par le processeur, amènent le processeur à :
    recevoir un paquet de données sans fil (228) d'un point d'accès (115), AP, où le paquet de données sans fil comprend un identifiant d'ensemble de services de base (225), BSSID, de l'AP (115) ;
    changer le BSSID du paquet de données reçu pour produire un paquet de données sans fil modifié (235) ; et
    transmettre le paquet de données sans fil modifié (235) à une application (140) sur le dispositif (105) .
  15. Dispositif (105) selon la revendication 14, comprenant en outre un contrôleur (135) électroniquement couplé à l'adaptateur sans fil (130) configuré pour fournir une clé de chiffrement à l'adaptateur sans fil (130) à utiliser pour chiffrer le BSSID, et/ou l'adaptateur sans fil (130) sépare des informations dérivées d'un BSSID réel d'un programme logiciel, d'un système d'exploitation, ou des deux, du dispositif.
EP20110830038 2010-09-30 2011-09-30 Préservation de la confidentialité pour les dispositifs sans fil Not-in-force EP2622888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/895,352 US8351354B2 (en) 2010-09-30 2010-09-30 Privacy control for wireless devices
PCT/US2011/054429 WO2012045043A2 (fr) 2010-09-30 2011-09-30 Préservation de la confidentialité pour les dispositifs sans fil

Publications (3)

Publication Number Publication Date
EP2622888A2 EP2622888A2 (fr) 2013-08-07
EP2622888A4 EP2622888A4 (fr) 2014-01-15
EP2622888B1 true EP2622888B1 (fr) 2015-05-20

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US (2) US8351354B2 (fr)
EP (1) EP2622888B1 (fr)
JP (1) JP5600214B2 (fr)
KR (1) KR101505846B1 (fr)
CN (1) CN103250440B (fr)
BR (1) BR112013007352A2 (fr)
WO (1) WO2012045043A2 (fr)

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US8351354B2 (en) 2013-01-08
US20130094489A1 (en) 2013-04-18
CN103250440A (zh) 2013-08-14
WO2012045043A2 (fr) 2012-04-05
CN103250440B (zh) 2016-06-01
JP5600214B2 (ja) 2014-10-01
US9143931B2 (en) 2015-09-22
KR20130054399A (ko) 2013-05-24
US20120082313A1 (en) 2012-04-05
JP2013543707A (ja) 2013-12-05
WO2012045043A3 (fr) 2012-06-28
BR112013007352A2 (pt) 2017-12-05
EP2622888A2 (fr) 2013-08-07
EP2622888A4 (fr) 2014-01-15

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